chemistry - 6. rates and reversible reactions paper 2

Smaller particles → bigger particles

increase temperature. particles move faster with more energy and more particles have at least activation energy. More successful collisions per second.

more → less particles

Increase concentrator or pressure. more particles in the same volume. More successful collisions per second.

non - cut solid → cut solid

cut solids into smaller pieces. Higher surface area to volume ratio. More successful collisions per second.

Progress of reaction

Add a catalyst, it lowers the Ea (not used up). More particles have at least the Ea. More successful collisions per second.

Describe rates over time plan for 3 marker

0-2 mins:

2-4 mins:

4+ mins:

Reversible reaction symbol

—→

←—

Forward and backward rates

The same

Concentrations of chemicals

Won’t change

Has to be in

Closed system